Pin-tumbler lock having interchangeable cylinder extensions.



J. H. SHAW. PIN TUMBLER LOGKHAVING INTERGHANGEABLE CYLINDER EXTENSIONS.

APPLICATION FILED NOV. 2% 1911v Patented May 28, 1912.

m J m g? STATES f PATENT OFFICE...

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'boi'm 11. S w, NEW navsmoonnnc'rxcur, ASSIGNOR r SARGENT NEW HAVEN,-CONNECTICUT, A CORPORATION.

PIN-trimaran Loqx HAVING INTERCHANGEABLE CYLINDER nx-rm rsrous.

,e d 7 Specification of Letters Patent- Patented May 28,1912

Application filed. November 24, 1911.. serial No. scant of constructionand combinations of parts as will be hereinafter described and pointedout in the claims.

For the purpose of illustratin my invention, I have shown it as appli toa single pin-tumbler lock, but it may be applied in .TQalhb'fwin it mayconcern:

a EJIBe'itknOWn't-hat I, JOHN H. SHAW, a citizen or the United-States,residing at New i Haven, in the county of- New'Haven and QKiSt'ate' ofConnecticut, have invented a new -.ai id useful Improvement inPin-Tumbler -Having Interchangeable Cylinder Extensions; and I ,dohereby declare the following, whentaken in connection with theaccompanying drawings and the characters of'reference marked thereon, tobe a full, clear, and exact description of the same, and

which said drawings constitute part of this specification, andrepresent, in-

jFigiire'l a view 1n front elevation of an extensible pine tumbler lockconstructed in Fig. 2 a

i'ovision with the shortest of its extensions. ig. 3 a'view thereof inrear elevation. Fig. 49. view thereof in verticallongitudinal secjtiQn,'Fig. 5 a view thereof in horizontal Section on' the line ab of Fig. 2.Fig. 6 a view. thereof in rear elevation with the extension removed.Fig. 7 a detached view n inside elevation of the extension. Fig. 8 afidetached .view of the extension in horizontal section on the line cdof Fig. 7. Fig. 9 a

detached perspective view of the bit. Fig. 10 a detached perspectiveview of the supplemental plug. Fig. 11 a detached plan view of'theplug-retaining-plate. Fig. 12 a detached view in vertical section of theshort extension. Fig. 13 a corresponding view of the-intermediateextension. Fig. 14 a corresponding View of the long extension. 1 Minvention relates to an improvement in extensible pin-tumblerlocks,'whether of the common single type, or the duplex type shown in myPatent N 0. 830,013 dated Septemberith, 1906, tlieobject of-my present"invention being to adapt single or duplex 'piii tumbler locks to beextended as required tofit doors of difi'erent thickness without anychange whatever in the tumbler-mechanism oi the locks which undergo nodeparture from standardization in being provided with in -improvement:-I

Vith these ends in view, my invention consists iii-a pin-tumblerlockhaving a series 'of interchangeable extensions differentiated fromeach other in length but alike at their respective ends.

My invention further consists in an extensible pin-tumbler lock havingcertain details w l I ,ble'r lock which I deem it unnecessary thecylinder 6 of the in-tumbler lock to they bolt-mechanism or 100 properwhich is mortised into the door in the ordinary manner, and which may beof'an struction and is unafl'ected y my present invention and thereforenot shown or described herein. e

I mav here state that while I have, in or- States Patent Oflice, spokenof my improvement as an improvement in pin-tumbler locks, the mechanismto which my particular invention relates is enerally known to the trade,as a pin-tumbler cylinder. I wish it also understood that although Ihave shown only three interchangeable extensions 2, 3 and 4,'this numbermay be varied according to the requirements of the trade, I shallhereafter refer to them respectively, as theshort, intermediate and longextensions.

Pin-tumbler lock cylinders are at present ordered by the trade, for themost part, to be made up with. cylinders of the right length to make thelocks suitable for application to doors of predetermined thickness. Thisis tor and remains in every respect unchanged;

but self-contained extensions of diiferent length are provided forbeinginterchanged with it as ordered.

The inner face of each of the extensions 2, 3 and 4 is formed with acounterbore 7 located below the axial center of the extension andadapted in size to fit closely over an approved con I der to follow thenomenclature of the United annular positioning shoulder 8 formed uponinder, below the center thereof, whereby each extension is centered withrespect to the cylinder to which it conforms in diameter, the

. extensions being rigidly secured to the cylinder by screws 26 (Fig. 5)located opposite each other and extending from rear to front throughscrew-holes 9, (Fig. 7) formed in the extensions and enteringscrew-holes 9 (Fig; 6) formed in the rear face of the cylinder. Aplug-retaining plate 10 (Fig. 11) secured to the shoulder? by screws 11,enters a groove 19. near the inner end of the plug 13 and provides forholding the same against longitudinal displacement in the cylinder 6without interfering with its free rotation therein.

At its extreme rear end the plug 13 is formed wit-h a transverselyarranged coupling-lug 1 1- which enters a corresponding groove 15extending transversely across the inner face of a supplemen al plug 16rotatably mounted in each of the extensions 2, 3 and 4, by being locatedin a circular opening 17 leading out of the bottom of the counter-bore 7of each extension. Each supplemental plug 16 is furnished at its innerend with an annular retaining-shoulder 18 which bears upon an annularbearing-shoulder l'tlfltoru'led between the counterbore 7 and thecircular opening 17 of each extension. The outer end of eachsupplemental plug 16 is formed with a couplinglug 20 arranged at arightangle to the groove 15 in its inner face and entering a couplingslot. 21 formed in the body of each bit 22, the'respective bits beingsecured to the supplemental plugs 16 by screws 23.

Each of the interchangeable extensions 2, 3 and 4: will be provided witha standard bit 22, but in the several extensions the supplemental plugs16 will vary in length in ac cordance with the length of the extensions.Beyond these two differences, namely, the length .of the extension andthe length of the supplemental 'plug, all of the interchangeableextensions are alike.

As shown, the pin-tumbl er.1 lock cylinder 6 is provided withfive'twoi-p girt tumblers 24 each of which is operatcd bya spring 25,

all of ordinary constructioi'il' It will be seen from theforegoin g thatby invention, 1 ani enabled toeni pl oyia-standard cylinder whethersingle on adapt it to the requirements means of my duplex, 3 1ml vof'doors ol any tluelmess by providing it length l .'roni a series ofinterchangeable extens1ons.l,'. t

The constructionpf my improved pin-' tumbler cylinder lock is'not only smple and without interfering *w" be coupled with a standard extensionehoseib for 'its' varying in length.

cylinders which remain a constant factor. As already explained, theapplication of my invention to duplex locks, is effected in preciselythe .way herein described. Also I do not limit myself to pin-tumblerlocksof. any particular construction, nor to the use of any number ofinterchangeable, ex-' tensions.

I claim '1. A pin-tumbler lock cylinder provided with a rotatable plugextending lon 'tudinally through it, the cylinder being ormed atitsinner end with a positioning-shoulder provided to position any one of aseries of interchangeable, externally threadedtcylin- (lGP-BXtGIlSIOIlSsubstantially corresponding to the cylinder in diameter and difierentivends."

. E 2. As anew article of manufacture, a

cylinder-extension for pin-tumbler locks,

.ated in ldigth but alike at their respective the said extension havingcircumferential threads and provided-with a bit, and-with a supplementalplug for being coupled with the plug of the cylinderlock.

3. In an extensible pin-tumbler the i combination with the cylinderthereof, of a 11 v rotatable plug mounted in the said cylinder;

. n externally. threaded cylindert substantially corresponding tothesaid inder in diameter and adapted to be remov- 1 ably attached to theinner end thereof, and

a supplemental plug rotatably mounted in.

the cylinder-extension and adapted to be} I coupled with the rotatableplugvm'ounted in thecylinder proper.

4-. The combination with 'a pin-tumbler lock cylinder, of acylinder-extension hav ing external circumferential, threads andprovided with a bit and with a supplemental plug secured tothe said bitand adapted to with the plug of the cylinder,

and means for securing the said extension. to

the rear end of the cylinder.

5. The combination with a pin-tumbler lock cylinder, of acylinder-extension having the face of its inner end counterbored to fitover the projecting plug of the cylinder, a supplemental plug mounted inthe-cylinderextension and adapted to be coupled with the rear end of theplug. of the cylinder, av bit secured vto'the supplemental plug. 6. Thecombination with a pm-tumbler and lock cylinder; iott'a series ofinterchangeable I cylinder-exteiisionstdifi'erentiated in length butalike-fiat their-ends, each of the tensions being formed with externalplug adapted to becoupled with the (plug'of the cylinder, and with a bitfastene tothe said supplemental plug, the said cylindersaid ex;

threads j and each being provided with a supplemental extensions and"their supplemental plugs 7. A cylinder extension tor the cylindersofpin-tunibler locks, the said extension cor- 'responding in diameter tothe cylinder In testimony whereof, I havesigned this which it isdesigned to extendend provided specification in the presence of two sub-I with external threads, with a'bit and with a scribing Witnesses.supplemental ilug carrying the said bit at JOHN H. SHAW.

its outer end and adapted at its inner end Witnesses:

- to be coupled with the-inner end of the plug SYDNEY SARGENT,

of the lock. BERTHA RAY.

